Home
Class 12
PHYSICS
Assertion: Through large number of free...

Assertion: Through large number of free electron are present in the metal, yet there is no current in the absent of electric field.
Reason: In the absence of electric field, electrons move remdomly in all directions

A

if both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

B

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C

if Assertion is true, but the Reason is false.

D

if both Assertion and Reason are false

Text Solution

Verified by Experts

The correct Answer is:
b

Free electrons present in the metal are moving randomly in all directions in of electric field. Hence, the average velocity of electrons is zero. Because of it the current does not flow in the metal in the absence of electric field.
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC CHARGE, FIELD & FLUX

    A2Z|Exercise AIPMTNEET Questions|24 Videos
  • ELECTRIC CHARGE, FIELD & FLUX

    A2Z|Exercise AIIMS Questions|26 Videos
  • ELECTRIC CHARGE, FIELD & FLUX

    A2Z|Exercise Problems Based On Mixed Concepts|40 Videos
  • DUAL NATURE OF RADIATION AND MATTER

    A2Z|Exercise Section D - Chapter End Test|30 Videos
  • ELECTRIC POTENTIAL & CAPACITANCE

    A2Z|Exercise Section D - Chapter End Test|29 Videos

Similar Questions

Explore conceptually related problems

A large number of free electrons are present in metals. Why is there no current in the absence of electric field across ot, but threre is a current in the presence of electric field?

Assertion : There is no current in the metals in the absence of electric field. Reason : Motion of free electron are randomly.

The average velocity of electrons in a conductor in the absence of electric field is

Assertion: Drift velocity of electrons is independent of time. Reason: Electrons are accelerated in the presence of electric field.

When electric field (vec(E)) is applied on the ends of a conductor, the free electrons starts moving in direction

If an electron has an initial velocity in a direction different from that of an electric field, then the path of the electron is

In the absence of electric field, the mean velocity of the electrons in a conductor at absolute temperature T is

A2Z-ELECTRIC CHARGE, FIELD & FLUX-Section B - Assertion Reasoning
  1. Assertion. A metallic shield in the form of a hollow shell, can be bu...

    Text Solution

    |

  2. Assertion: If bob of a simple pendulum is kept in a horizontal electri...

    Text Solution

    |

  3. Assertion: Through large number of free electron are present in the m...

    Text Solution

    |

  4. Assertion: If the meduim between two charges is replaced by another me...

    Text Solution

    |

  5. Assertion: The electric field due to dipole on its axis line at a dist...

    Text Solution

    |

  6. Assertion: When a body acquires positive charge, its mass decreases ...

    Text Solution

    |

  7. Assertion: A small metal ball is suspended in a uniform magnetic field...

    Text Solution

    |

  8. Assertion: Vehicle carrying highly inflammable materials have hanging ...

    Text Solution

    |

  9. Assertion: A line of force has sudden breaks. Reason: An electrostat...

    Text Solution

    |

  10. Assertion. When charges are shared between any two bodies, no charge i...

    Text Solution

    |

  11. Assertion: The surface charge densities of two spherical conductors of...

    Text Solution

    |

  12. Assertion: Three equal charges are situated on a circle of radius r su...

    Text Solution

    |

  13. Assertion: On going away from a point charge or a small electric dipol...

    Text Solution

    |

  14. Assertion: The whole charge of a conductor cannot be transferred to an...

    Text Solution

    |

  15. Assertion: At a point in space, the electric field points towards nort...

    Text Solution

    |

  16. Assertion: A point charge is brought in an electric field. The field ...

    Text Solution

    |

  17. Assertion: The lightening conductor at the top of high building has sh...

    Text Solution

    |

  18. Assertion: The tyres of aircraft's are slightly conducting. Reason: ...

    Text Solution

    |

  19. STATEMENT -1 : Induced charge does not contribute to electric field or...

    Text Solution

    |

  20. Assertion. A metallic shield in the form of a hollow shell, can be bu...

    Text Solution

    |